Most common C# bitwise operations on enums

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For the life of me, I can’t remember how to set, delete, toggle or test a bit in a bitfield. Either I’m unsure or I mix them up because I rarely need these. So a “bit-cheat-sheet” would be nice to have.

For example: 

flags = flags | FlagsEnum.Bit4;  // Set bit 4.

or

if ((flags & FlagsEnum.Bit4)) == FlagsEnum.Bit4) // Is there a less verbose way?

Can you give examples of all the other common operations, preferably in C# syntax using a [Flags] enum?

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